Resilient end buffer for railway cars and locomotives



J. w. MARSH Jan. 27, 1948.

RESILIENT4 END-BUFFERS FOR RAILWAY GARS AND LOCOMOTIVES 2 sheetS-shee 1Filed Nov. 9, 1944 FIG. 3.

FlG.4.

IN V EN TOR.

ATTORNEYS.

Jarvn. 27, 1948. I .1.` w. MARSH v 2,434,943

RESILIENT END-BUFFERS FOR RAILWAY CARS -AND LOCOMOTIVES Filed Nov. 9,1944 2 Sheets-Sheet 2 Fla?.

FIG. 8.

INVENTOR.

A TTORN E YS.

Patented` Jan. 27, 1948 UNITED ES GFFICE.

2,434,943. l Y REsmsNT ENU'BUFFER 'Fon mmwav CRS" AND LOCMOTI'VES JohnW.y lI/.iarsln Alexandria, Yam assigner of onefourth to. FlorenceE..Marsh, enel-fourth to Marianne Marsh, and one-fourth to Mary Marsh,al1 of Alexandria@ Va.

Application.: November 9, 15944, Seriali iva-5623655 Claims. l

This invention relates toimprovementsln butt'-l ersf or railway cars andlocomotives..

Itis among the. objects of the present invention to rntoyidev a deviceAof. the. class described which formsai unit. assembly.. without, bolts,nuts or similar fastening` devices.

Another object. is. to provide; an arrangement. of cooperating. elementswhich. is simpliii'ed as to construction andi assembly l These, and'other ohjfects and advantages off my invention will become apparent.upon. a consideration of the following detailed description lwhentallren.l in. conjunction with the. following; drawings,V in which Fig.`I is a sectional" view of a huer construction taken along the line I`Iof Fig, 2' embodying the elements of the present invention.

Fig. 2` is a sectional view taken along the line 2 2 ofi-Figs', I'and'..

Fig. 3' is. a sectional view taken along; the line.

'3b- 3 of Fig. 4' and showing a more detailed; view ofthe buier housing;Fig. 4 is an end view of the louifer4 housing.` Fig; 'isa sider viewofthe buerloclt; Fig: 6 i's an endview'of the buffer lock.

Fig; 'T is a sectionalA view' of an alternate' buffer construction takenalong-the line I--I of Fig; 2. Fig; 8 isv a side vi'evr oi' thealternate buiierlock. Fig. 9Y isa end view of theA alternatebuif'er'lock. Referring to the drawings it will be 'seen that there is providedlya cylindrical hou-sing If on one end of which is formed* a flangeportion 2v suitaille for attachment,V to the frame of a railway vehicle;The hanged end or the housing. is closed by' a; plate having; anundulateol` surface I# (Fig. 3)' towards the interior of the housing,the purpose of which will be' explained hereafter. The open end of thehousing has inwardly projecting lipsl 4, 5. Si, T, formed thereonspaced; uniformly around the inner peripheryl of the` housing andextending over less than half off vsaid inner periphery 'leaving spaces8.5,. 9,. Ill- H', therebfa. i'i'iivieemv The .buffer plunger' is'-provided at 'its outer end wl'th'ar buili'ng head I2 attached toacylin-v drical portion I3, adapted to oscillatewithin the innenpenpheries of lips Il, 5,. 6:, 1... zeniof. cylindrical portion ISL isprovided with outwardlygflairing sectors- I:4- I'5 I-g. I1., spaceduniformly-y around. the: periphery and adapted :to osoillatef thecylindrical housing. I., and. to pass through the spaces 8, 9, I0, I I.The buiei: lock I8, shown. in more detail in Eiga .5V andi 6,. islprovided. with a, base Il. having antinner surface v2li suitablevforengaging a spring;

. 2 2c, an. outer surface` 2 I iormed to the contour ot: undulatedsurface 3 (Fig- 3). The lock. is provided with means cooperating with.means on the plunger tu hold theil'ook and plunger againstrelative-,rotational movement.. In. the: construe tion; illustrated.such. means take.- thef. form of axial. keys 22,. 23- on. the. lock:which. are engageabflerwitnlportionse 'of projections I4, I5, I6'- andIlI on thev plunger. The plunger is free' tomovie axially relativa to:the lock while the: keys remain in engagement with theportions of thevprojectionsreferredt The: spring.' 2t.K is positioned withinycylindrical portion 153;. iny :amianneril as tol continual-ly contact-biiier head. t2 andi surfacel 20 of the.l buffer lock.

The central portion of spring 24 is shown broken away in Fig. 1 to moreclearly show the con struction-of the outwardiy flaringl sector I5.

will be noted that:l the undulateii. surface 2| mig.. ).l ons'bni'ferlock I-.8 is provided; with Jde;n pressions.` 25v 2 21 28,. whichcorrespond with receive: elevated portions 29; 30', 3l., 32respectively; on undulated surface 3 tFig. 3.)- when the. buffer is.assembled-.with theV lceysf 22, 23.,` fitted within the. outwardlyflaring sectors; I4, I6. of the cylindrical portion lf3- and. with the.outwardly daring; sectors th, IE5. I.Ii,-. IJ, abutting., lips. 5, 4.,..'I, Ei.. When the; assembly of. cylindrical. portion. Il3 and-.1ock L8-is rotated to. permit the outwardly haring. sectors III,4 I5,. I6 9.1,.to correspond with spaces 9, 8 H III, the elevated portions 29, 3.0, 31,A 32,A onlsurface. 3 will. abut` the elevated porgtions 36;. 33,. 34,35,. ot surface. 2 I..v This, rotation will move: lock. I.8` axiallyrelative to the housing I- and. compress spring 2l...

'lil-1e' assembly of the-bu'er is accomplished by inserting the:assemblyof, cylindrical portion. I3., spring. 24 andi lock.. I8, intothe housing. I, the outwardly flaring. sectors I4, I`5.`,. IR, I.Tpassing through spaces-9, 8,. I'I,` Ill., until the elevatedportions 36,33,. 31,. 35'.. onsurface 2 I ahuttheeievatefd portions.2& 311 313,32913. 'susi'aceA 3; 'Axial` move'- .menit thescylindrcalportion. I3.is.' continued,

compressing ntil the outwardlyl flaring sectors; III, I`5 Il',J ILp lsslips 5., 4 'I, 6; when the interior assembly is. rotated' within thevhousing I to theiposi'tion shown Figi. 1 until outwardly flaringsectors; I4, I5, t6, I'I are aligned 'with lips 5;, 4 'I'. I and`depresjons 25, 26', 2", 28` receive fromit's normally, assembledpositionin thehousing. I' is restrained byltheengagement or" the keys 23',within the outwardly aringjsectors I4; I6'. rotation of the. keysrelativel to the housing base 44 opposite depressions 45, 41, solthatfwhen'4 depressions 45, 46. 41, 48, receive elevated portions 3D,3l, 32, 29, keys 4I, 42,"lie-between'outwardly flaring portions I4, l5,and I6,I1, respectively, j

In assembly of the alternate construction, buffer lock 43 is inserted inhousing I, keys 4I, 42, passing through spaces 9, I I, then rotatedwithin housing I until the elevated portions 49, 50,'5I,1'52, abutelevated portions 30, 3l, 32, 29, on surface 3 1 (Fig. 3). Spring 24 andcylindrical portion I3 are inserted in the housing, outwardly flaringportions I4,`I5, I5, I1, passing through spaces 9, 8, II, l0, and keys4l, 42, entering spaces 40, 38, The cylindrical portion I3 is insertedinto case -I until outwardly fiaring portions I4, I5, I6, I 1, pass lips5, 4, 1, 6, compressing spring 24,'wh'en cylindrical portion I3 and lockare rotateduntil depressions 45, 46, 41, 48 receive elevated portions30, 3l, 32, 29, and outwardly flaring portions I4, I5, Iii,l I1, arecoextensive with lips 5, 4, 1, 6.

Other modifications will suggest themselves to one skilled in the art,and it is understood that I do not wish to be limited to the particulardetails and arrangement disclosed but by scope of the claims. l

I claim:

l.- A buffer comprising an outer cylinder having one end substantiallyclosed and'havin'g inwardly projecting shoulders at the oppositeend,'said closed end having an undulated surface facing the interior ofthe cylinder, an inner cylinder slidably disposed in said outer cylinderand adapted to project therefrom, said inner cylinder having a buiinghead on its exposed end and radially projecting portions adjacent itsend within the outer cylinder, said portions being substantiallycoextensive with the shoulders aforesaid and spaced at intervalspermitting the passage of the latter therebetween, a key memberpositioned Within said outer cylinder, comprising an elongated portionadapted to engage said radially projecting portions and a plate portionhaving an undulated surface adapted to cooperate crest to valley withsaid undulated surface on Vthe end of vsaid outer cylinder, whenaforesaid radially projecting portions are substantially coextensivewith said shoulders, and a resiliently compressible member positionedwithin the inner cylinder and abutting the plate portion of the keymember and the bufng head'of the inner cylinder. i

"2. A buffer comprising an outer cylinder having one end substantiallyclosed and having inwardly projecting shoulders at the opposite end, the

closed end of said outer cylinderhaving an undulatedV surface facing theinteriorof thecylinder, an inner cylinder slidably disposed in saidouter vcylinder and adaptedto project therefrom,'said positioned withinsaid outer cylinder comprising a plurality of elongated portions adaptedto engage said radially projecting portions on the inner cylinder, and aplate portion having an undulated surface adapted to cooperate crest tovalley with said undulated surface on the interior of the 'closed'end ofthepouter cylinder, when said radially projecting portions aresubstantially coextensive with the shoulders on the outer cylinder, anda resiliently compressible member positioned within the inner cylinderand abutting the plate portion of the key member and the bumng head onthe inner cylinder.

3. A buier comprising an outer cylinder having oneend substantiallyclosed and having inwardly projecting shoulders at the open end, theouter cylinder havingr an undulated surface on its closed end facing theinterior of the cylinder, an inner cylinder slidably disposed in saidouter cylinder andv adapted to project therefrom, the inner cylinderhaving a bufiing head on its exposed end and radially projectingportions adjacent its end within the outer cylinder, said portions beingsubstantially coextensive with the shoulders on the outer cylinder andspaced at intervals permitting the passage of the latter therebetween, akey member positioned Within said outer cylinder, comprising anelongated portion adapted to engage radially projecting portions on theinner cylinder, and a plate portion having undulated surface adapted tocooperate, crestto valley, with the undulated surface formed on interiorof the closed end of the outer cylinder, when the radially projectingportions on the inner cylinder are in alignment with the shoulders onthe outer cylinder and to abut, crest to crest, with the undulatedsurface on the closed end of the outer cylinder, when said radiallyprojecting portions are aligned with the intervals between theshoulders, and a resiliently compressible member positioned within theinner .cylinder and abutting the plate portion of the key member and thebuiiing head on the inner cylinder.

4. A buier comprising a housing'havingone end substantially closed andprovided at its open end with circumferentially spaced inwardprojections, a hollow plunger mounted in the housing forsliding movementWithin the projections `|and having a portion extending out of thehousing, the exposed end of the plunger being closed, the portion of theplunger within the housing having circumferentially spaced outwardprojections behind and aligned with the projections on the housing, theprojections on the plunger being adapted, upon relative rotation of thehousing and plunger, to bepassed between the. projections on thehousing, a key member Within the housing, the key member and plungerhaving interengaging means preventing relative angular movement of theplunger and member while permitting their relative axial movement,interengaginglmeans on the key member and on the housing adjacent itsclosed end operable to resist relative rotation of the key member andhousing, and spring means within the housing and plunger engaging at oneend the closedl outer end of the plunger and, at the other end. aportion of the key member, said spring means acting to hold theinterengaging means on the key member and housing inoperative relation,wherebyrthe projections on the' 5. A buffer comprising a lhousing havingAone iend substantially closed' and provided at its open end with.circumferentially spaced inward pro-- jections, a hollow plunger mountedin the housing for sliding movement Within the projections and having aportion extending out of the housing, the exposed end of the plungerbeing closed, the portion of the plunger within the housing havingcircumferentiallyspaced outward projections behind and aligned with theprojections on the housing, the projections on the plunger beingadapted, upon relative rotation of the housing and plunger, to be passedbetween the projections on the housing, a key member within the housinghaving an end portion seated against the closed end of the housing, thekey member and plunger having interengaging means preventing relativeangular movement of the key member and plunger while permitting theirrelative axial movement, interengaging means on the key member and onthe housing adjacent its closed end operable to resist relative rotationof the key member and housing, and spring means Within the housing andplunger corri-ined between the closed outer end of the plunger and theend portion of the key member, said spring means acting to hold theinterengaging means on the key member and housing in operative relation,whereby the projections on the plunger are maintained in alignment withthose on the housing.

JOHN W. MARSH.

